function md5(value){
    var hex_chr = "0123456789abcdef",
        rhex = function(num) {
            var str = "";
            for(j = 0; j <= 3; j++)
                str += hex_chr.charAt((num >> (j * 8 + 4)) & 0x0F) +
                    hex_chr.charAt((num >> (j * 8)) & 0x0F);
            return str;
        },
        str2blks_MD5 = function(str) {
            nblk = ((str.length + 8) >> 6) + 1;
            blks = new Array(nblk * 16);
            for(i = 0; i < nblk * 16; i++) blks[i] = 0;
            for(i = 0; i < str.length; i++)
                blks[i >> 2] |= str.charCodeAt(i) << ((i % 4) * 8);
            blks[i >> 2] |= 0x80 << ((i % 4) * 8);
            blks[nblk * 16 - 2] = str.length * 8;
            return blks;
        },
        add = function(x, y) {
            var lsw = (x & 0xFFFF) + (y & 0xFFFF);
            var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
            return (msw << 16) | (lsw & 0xFFFF);
        },
        rol = function(num, cnt) {
            return (num << cnt) | (num >>> (32 - cnt));
        },
        cmn = function(q, a, b, x, s, t) {
            return add(rol(add(add(a, q), add(x, t)), s), b);
        },
        ff = function(a, b, c, d, x, s, t) {
            return cmn((b & c) | ((~b) & d), a, b, x, s, t);
        },
        gg = function(a, b, c, d, x, s, t) {
            return cmn((b & d) | (c & (~d)), a, b, x, s, t);
        },
        hh = function(a, b, c, d, x, s, t) {
            return cmn(b ^ c ^ d, a, b, x, s, t);
        },
        ii = function(a, b, c, d, x, s, t) {
            return cmn(c ^ (b | (~d)), a, b, x, s, t);
        },
        MD5 = function(str) {
            x = str2blks_MD5(str);
            var a =  1732584193;
            var b = -271733879;
            var c = -1732584194;
            var d =  271733878;

            for(i = 0; i < x.length; i += 16)
            {
                var olda = a;
                var oldb = b;
                var oldc = c;
                var oldd = d;

                a = ff(a, b, c, d, x[i+ 0], 7 , -680876936);
                d = ff(d, a, b, c, x[i+ 1], 12, -389564586);
                c = ff(c, d, a, b, x[i+ 2], 17,  606105819);
                b = ff(b, c, d, a, x[i+ 3], 22, -1044525330);
                a = ff(a, b, c, d, x[i+ 4], 7 , -176418897);
                d = ff(d, a, b, c, x[i+ 5], 12,  1200080426);
                c = ff(c, d, a, b, x[i+ 6], 17, -1473231341);
                b = ff(b, c, d, a, x[i+ 7], 22, -45705983);
                a = ff(a, b, c, d, x[i+ 8], 7 ,  1770035416);
                d = ff(d, a, b, c, x[i+ 9], 12, -1958414417);
                c = ff(c, d, a, b, x[i+10], 17, -42063);
                b = ff(b, c, d, a, x[i+11], 22, -1990404162);
                a = ff(a, b, c, d, x[i+12], 7 ,  1804603682);
                d = ff(d, a, b, c, x[i+13], 12, -40341101);
                c = ff(c, d, a, b, x[i+14], 17, -1502002290);
                b = ff(b, c, d, a, x[i+15], 22,  1236535329);

                a = gg(a, b, c, d, x[i+ 1], 5 , -165796510);
                d = gg(d, a, b, c, x[i+ 6], 9 , -1069501632);
                c = gg(c, d, a, b, x[i+11], 14,  643717713);
                b = gg(b, c, d, a, x[i+ 0], 20, -373897302);
                a = gg(a, b, c, d, x[i+ 5], 5 , -701558691);
                d = gg(d, a, b, c, x[i+10], 9 ,  38016083);
                c = gg(c, d, a, b, x[i+15], 14, -660478335);
                b = gg(b, c, d, a, x[i+ 4], 20, -405537848);
                a = gg(a, b, c, d, x[i+ 9], 5 ,  568446438);
                d = gg(d, a, b, c, x[i+14], 9 , -1019803690);
                c = gg(c, d, a, b, x[i+ 3], 14, -187363961);
                b = gg(b, c, d, a, x[i+ 8], 20,  1163531501);
                a = gg(a, b, c, d, x[i+13], 5 , -1444681467);
                d = gg(d, a, b, c, x[i+ 2], 9 , -51403784);
                c = gg(c, d, a, b, x[i+ 7], 14,  1735328473);
                b = gg(b, c, d, a, x[i+12], 20, -1926607734);

                a = hh(a, b, c, d, x[i+ 5], 4 , -378558);
                d = hh(d, a, b, c, x[i+ 8], 11, -2022574463);
                c = hh(c, d, a, b, x[i+11], 16,  1839030562);
                b = hh(b, c, d, a, x[i+14], 23, -35309556);
                a = hh(a, b, c, d, x[i+ 1], 4 , -1530992060);
                d = hh(d, a, b, c, x[i+ 4], 11,  1272893353);
                c = hh(c, d, a, b, x[i+ 7], 16, -155497632);
                b = hh(b, c, d, a, x[i+10], 23, -1094730640);
                a = hh(a, b, c, d, x[i+13], 4 ,  681279174);
                d = hh(d, a, b, c, x[i+ 0], 11, -358537222);
                c = hh(c, d, a, b, x[i+ 3], 16, -722521979);
                b = hh(b, c, d, a, x[i+ 6], 23,  76029189);
                a = hh(a, b, c, d, x[i+ 9], 4 , -640364487);
                d = hh(d, a, b, c, x[i+12], 11, -421815835);
                c = hh(c, d, a, b, x[i+15], 16,  530742520);
                b = hh(b, c, d, a, x[i+ 2], 23, -995338651);

                a = ii(a, b, c, d, x[i+ 0], 6 , -198630844);
                d = ii(d, a, b, c, x[i+ 7], 10,  1126891415);
                c = ii(c, d, a, b, x[i+14], 15, -1416354905);
                b = ii(b, c, d, a, x[i+ 5], 21, -57434055);
                a = ii(a, b, c, d, x[i+12], 6 ,  1700485571);
                d = ii(d, a, b, c, x[i+ 3], 10, -1894986606);
                c = ii(c, d, a, b, x[i+10], 15, -1051523);
                b = ii(b, c, d, a, x[i+ 1], 21, -2054922799);
                a = ii(a, b, c, d, x[i+ 8], 6 ,  1873313359);
                d = ii(d, a, b, c, x[i+15], 10, -30611744);
                c = ii(c, d, a, b, x[i+ 6], 15, -1560198380);
                b = ii(b, c, d, a, x[i+13], 21,  1309151649);
                a = ii(a, b, c, d, x[i+ 4], 6 , -145523070);
                d = ii(d, a, b, c, x[i+11], 10, -1120210379);
                c = ii(c, d, a, b, x[i+ 2], 15,  718787259);
                b = ii(b, c, d, a, x[i+ 9], 21, -343485551);

                a = add(a, olda);
                b = add(b, oldb);
                c = add(c, oldc);
                d = add(d, oldd);
            }
            return rhex(a) + rhex(b) + rhex(c) + rhex(d);
        };

    return MD5(value);
}

console.log(md5("123465798"))
